Add JSON.pm to third_party

third_party/JSON/JSON-2.59/t/e08_decode.t

Index: third_party/JSON/JSON-2.59/t/e08_decode.t
diff --git a/third_party/JSON/JSON-2.59/t/e08_decode.t b/third_party/JSON/JSON-2.59/t/e08_decode.t
new file mode 100644
index 0000000000000000000000000000000000000000..3782dfd8832270424d52d2fdfb59cd88bcb4b598
--- /dev/null
+++ b/third_party/JSON/JSON-2.59/t/e08_decode.t
@@ -0,0 +1,41 @@
+#
+# decode on Perl 5.005, 5.6, 5.8 or later
+#
+use strict;
+use Test::More;
+
+BEGIN { plan tests => 6 };
+
+BEGIN { $ENV{PERL_JSON_BACKEND} = "JSON::backportPP"; }
+
+use JSON;
+
+BEGIN {
+    use lib qw(t);
+    use _unicode_handling;
+}
+
+no utf8;
+
+my $json = JSON->new->allow_nonref;
+
+
+is($json->decode(q|"ü"|),                   "ü"); # utf8
+is($json->decode(q|"\u00fc"|),           "\xfc"); # latin1
+is($json->decode(q|"\u00c3\u00bc"|), "\xc3\xbc"); # utf8
+
+my $str = 'あ'; # Japanese 'a' in utf8
+
+is($json->decode(q|"\u00e3\u0081\u0082"|), $str);
+
+utf8::decode($str); # usually UTF-8 flagged on, but no-op for 5.005.
+
+is($json->decode(q|"\u3042"|), $str);
+
+
+my $utf8 = $json->decode(q|"\ud808\udf45"|); # chr 12345
+
+utf8::encode($utf8); # UTf-8 flaged off
+
+is($utf8, "\xf0\x92\x8d\x85");
+